A new microwave asphalt radar

This article presents a new K-band asphalt radar for evaluating road pavement surface layer density during construction. The frequency range of operation is 13-17 GHz. A high frequency band is needed since the new asphalt overlays are very thin. Therefore, better resolution of the radar system is required. In this paper, the new radar system is described in detail. The first laboratory analyses of the asphalt sample are presented using the new radar. This serves the purpose of evaluating and testing the performance of the new radar measurement setup. The radar will be used later for mobile road surveying.